Next week, Seattle’s new public library – designed by Rem Koolhaas – opens, and Herbert Muschamp is ecstatic: “In more than 30 years of writing about architecture, this is the most exciting new building it has been my honor to review. I could go on piling up superlatives like cars in a multiple collision, but take my word: there’s going to be a whole lot of rubbernecking going on.”